Rangevalidator error

hi,
i am validate one text box with rangefeild validator  my requirement is the enter text in textbox minimum 5 chars and maximum 100
i set the porperties of rangeValidator : type=string
                                                              controlToValidate="id of textbox"
                                              maximumvalue=100
                                              minimumvalue=5 but it cant display error that is :-

The MaximumValue 100 cannot be less than the MinimumValue 5 of RangeValidator1.

plz give me suggestions